Abstract: This invention is related to a rotary charging plug structure of a charger, having: an upper lid to be matched with a lower lid so as to receive a circuit board therein, the lower lid being provided with a receiving chamber therein for receiving a blade base. The blade base is provided with two blades and shafts at each of opposing ends thereof. The shafts are each formed with an annular grove at a top end thereof for being integrally riveting to the shafts and includes the two stop blocks and a protruding block. The rear lid covers and urges against the blade base after placing the blade and the conductive plates into the receiving chamber. The rear lid includes a guide block at a center thereof to allow sliding movement of the protruding block of the blade base. Each of the through-holes and the guide block are provided with a push block therebetween for urging against the shafts. As such, the blades can be rotated within a 90° range.